In this April 30, 2012 photo, co-owner Kevin Wallace pours a shot of hashish-infused grapeseed oil over an order of stir-fried vegetables and meat at the Earth Dragon Edibles Restaurant & Lounge in Ashland, Ore. While medical marijuana cafes abound in Portland, Ore., restaurants dedicated to medical marijuana patients have been slow to gain traction. Earth Dragon is trying to overcome objections from City Hall that the restaurant violates federal drug laws, even though the hashish is given away for free. (AP Photo/Jeff Barnard)
HOLLAND -- West Michigan health officials say a restaurant in Holland has closed until further notice while authorities investigate an outbreak of illness that has affected at least 35 people who ate there.
The Ottawa County Health Department says Margarita's Mexican Restaurant voluntary shut down during the probe.
Health department spokeswoman Shannon Felgner tells Mlive.com that the illnesses were reported over the past several days.
The department started its investigation Thursday after getting reports of 10 illnesses, mostly involving nausea, vomiting and diarrhea.
So far, the cause of the outbreak hasn't been determined. Felgner says some samples from patients are being analyzed at Holland Hospital, and others may go to a state lab.